GB1227104A - - Google Patents

Info

Publication number
GB1227104A
GB1227104A GB1227104DA GB1227104A GB 1227104 A GB1227104 A GB 1227104A GB 1227104D A GB1227104D A GB 1227104DA GB 1227104 A GB1227104 A GB 1227104A
Authority
GB
United Kingdom
Prior art keywords
phosphor
pvm
suspension
dry
lehring
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed filed Critical
Publication of GB1227104A publication Critical patent/GB1227104A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C279/00—Derivatives of guanidine, i.e. compounds containing the group, the singly-bound nitrogen atoms not being part of nitro or nitroso groups
    • C07C279/20—Derivatives of guanidine, i.e. compounds containing the group, the singly-bound nitrogen atoms not being part of nitro or nitroso groups containing any of the groups, X being a hetero atom, Y being any atom, e.g. acylguanidines
    • C07C279/24—Y being a hetero atom
    • C07C279/26—X and Y being nitrogen atoms, i.e. biguanides
    • C07C279/265—X and Y being nitrogen atoms, i.e. biguanides containing two or more biguanide groups
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
    • C09K11/02—Use of particular materials as binders, particle coatings or suspension media therefor
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
    • C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
    • C09K11/70—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing phosphorus
    • C09K11/72—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing phosphorus also containing halogen, e.g. halophosphates
    • C09K11/73—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing phosphorus also containing halogen, e.g. halophosphates also containing alkaline earth metals

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Luminescent Compositions (AREA)
  • Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)
  • Paints Or Removers (AREA)

Abstract

1,227,104. Luminescent screens. GENERAL ELECTRIC CO. 17 Nov., 1969 [5 Dec., 1968], No. 56240/69. Heading C4S. [Also in Division C3] A method of coating a fluorescent lamptube comprises making an aqueous suspension of phosphor particles, flowing same over tube surface, drying, then lehring to effect bonding of the phosphor particles to the glass, the suspension containing by weight based on the dry phosphor 0À05 to 0À3% Ba(NO 3 ) 2 and from 0À3 to 0À9% of a temporary binder mix of ammoniacal carboxymethylcellulose (CMC) and 10 to 75% polyvinylmethyl ether/maleic anhydride copolymer (PVM/MA), the aqueous suspension having a basic pH of 8 to 13, preferably 9 to 11. The phosphor may be Sn and Mn activated calcium halophosphate and after firing may be milled in an aqueous PVM/MA suspension and washed with ammoniated ethylenediamine tetraacetic acid or sulphamic acid, then size classified. Ammonium nitrate may be added to the suspension as a 15 to 25% water solution and should be in amounts 0À1 to 2À5%, preferably 0À25 to 1À0% of the dry phosphor. 10% PVM/MA and 90% CMC may be used with an upper limit of 75% of PVM/MA, preferably 50%. Binder mix concentrations based on the dry phosphor are preferably 0À4 to 0À6% e.g. 0À55% for CaHPo 4 . Coating may be by down flushing and lehring at 625‹ to 650‹ C.
GB1227104D 1968-12-05 1969-11-17 Expired GB1227104A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US78163368A 1968-12-05 1968-12-05

Publications (1)

Publication Number Publication Date
GB1227104A true GB1227104A (en) 1971-04-07

Family

ID=25123410

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1227104D Expired GB1227104A (en) 1968-12-05 1969-11-17

Country Status (5)

Country Link
US (1) US3583879A (en)
BE (1) BE742033A (en)
DE (1) DE1958712A1 (en)
FR (1) FR2025436A1 (en)
GB (1) GB1227104A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4309408A1 (en) * 1993-03-19 1994-09-22 Prolux Maschinenbau Gmbh Suspension for the internal coating of glass vessels, especially lamp discharge vessels of complicated geometric shape, and method for the interior coating of the glass vessels

Also Published As

Publication number Publication date
DE1958712A1 (en) 1970-06-18
FR2025436A1 (en) 1970-09-11
BE742033A (en) 1970-05-04
US3583879A (en) 1971-06-08

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees